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Re: [Paparazzi-devel] How to Synchronizing the two Tiny boards?
From: |
Prof. Dr.-Ing. Heinrich Warmers |
Subject: |
Re: [Paparazzi-devel] How to Synchronizing the two Tiny boards? |
Date: |
Sat, 27 Oct 2012 12:27:50 +0200 |
User-agent: |
Mozilla/5.0 (Windows; U; Windows NT 5.0; de-DE; rv:1.4) Gecko/20030619 Netscape/7.1 (ax) |
Hi Autumn,
we made a time step message based on the GPS data all 0.5s.
You can use the internal time pulses generated by the timer and send
them down with the data you want to have (only a 32 bit integer).
After a flight we analyse the sd stored files and generate and sort the
the data a function of time by a small script program.
This is a way with now changes to any program code.
You have only to generate new messages.
You can use the paparazzi plot function to show the data.
Pleas read the documentation in the wiki.
http://paparazzi.enac.fr/wiki/Openlog
The Openlog is a small and low cost pcb (<20$) with a ATmega writing a
FAT system on a micro sd card.
Regards
Heinrich
Zhang Qiuchen schrieb:
Hello everybody!
My name is Autumn and I'm working on a system that uses paparazzi on a Tiny
v2.11 board (with LPC2148 as the main processor). I added a TWOG in addition to
the main autopilot Tiny to take data from some sensor and log them to a SD
card. However, the data that is logged in the SD card and the data sent back
via telemetry has non-matching time stamps. I wonder if I can synchronize the
two processors by configure the TWOG to use external clock and physically
connect the clock pin from Tiny to the TWOG.
Have anybody ever met problems on asynchronized data from two processors or
between telemetry data and data stored on board?
Thank you all for reading this and anything information you'd like to share!!!
Autumn
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